linux-kernel - Re: [PATCH 0/6] dell-smm-hwmon fixes

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Date:	Sat, 18 Jun 2016 17:26:00 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Jean Delvare <jdelvare@...e.com>,
	Jan C Peters <jcpeters89@...il.com>,
	Thorsten Leemhuis <fedora@...mhuis.info>,
	David Santamaría Rogado <howl.nsp@...il.com>,
	Peter Saunderson <peteasa@...il.com>,
	Tolga Cakir <cevelnet@...il.com>,
	"Austin S. Hemmelgarn" <ahferroin7@...il.com>,
	Mario_Limonciello@...l.com,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	Michał Kępień <kernel@...pniu.pl>,
	Dakota Whipple <dakotajaywhipple@...il.com>,
	Leon Yu <leon@...nyu.net>, linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] dell-smm-hwmon fixes

On Saturday 18 June 2016 17:13:59 Guenter Roeck wrote:
> On 06/17/2016 03:54 PM, Pali Rohár wrote:
> > I'm sending all my dell-smm-hwmon patches in one series, because
> > due to changes in code other patches depends on previous.
> > 
> > First two patches fixes problem with old /proc/i8k file. Second is
> > security fix and should be backported to all stable kernels (that
> > problem was there always). I tested i8kctl tool (from i8kutils
> > package) that it still works with these patches. Without root
> > access for those security operations just showes '?' or '-1'.
> > 
> > Third and fourth patches try to fix problem on machines with broken
> > SMM/BIOS when calling function fan_type().
> > 
> > Fifth is new feature and last sixth useful for debugging.
> > 
> > Pali Rohár (6):
> >    hwmon: (dell-smm) Fail in ioctl I8K_BIOS_VERSION when bios
> >    version is
> >    
> >      not a number
> >    
> >    hwmon: (dell-smm) Restrict fan control and serial number to
> >    
> >      CAP_SYS_ADMIN by default
> >    
> >    hwmon: (dell-smm) Disallow fan_type() calls on broken machines
> >    hwmon: (dell-smm) Cache fan_type() calls and change fan
> >    detection hwmon: (dell-smm) Detect fan with index=2
> >    hwmon: (dell-smm) In debug mode log duration of SMM calls
> >   
> >   drivers/hwmon/dell-smm-hwmon.c |  122
> >   ++++++++++++++++++++++++++++++++-------- 1 file changed, 99
> >   insertions(+), 23 deletions(-)
> 
> Pali,
> 
> You asked for additional testing, so I am not sure what you expect me
> to do.
> 
> Which of the patches can/should I apply now ?
> 
> Guenter

Test 3/6 and 4/6 patches on affected Dell machines. I CCed all people 
who tried to debug those bugs, so need confirmation from them that after 
applying 3/6 and 4/6 patches, erratic fan behaviour is not there...

But because those two patches depends on previous, it is needed to test 
whole series...

-- 
Pali Rohár
pali.rohar@...il.com

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